Bay Area radio stations keep changing formats, and apparently it's all your fault. Well, sorta. So says Ben Fong Torres in an article in the Chronicle. Responding to ratings and market research, Kiss (98.1 FM) has turned strictly old-school Motown, KFOG (10.45 FM) is leaning more toward classic rock, and Alice (97.3 FM) is turning Top 40. That's not what you ordered? Well, Arbitron used to measure people's listening habits with journals, but have likely gotten more accurate with PPM, the rating firm's new Portable People Meter, which records what you actually listen to as opposed to what you like to think you listen to.